White powder, insoluble in water, cold ethanol and ether, soluble in organic solvents such as hot benzene, benzene and turpentine, slightly soluble in hot ethanol and ether. It slowly decomposes when heated to 400°C, and it is flammable. When it is dissolved into stearic acid and corresponding calcium salt, it is hygroscopic.

1. Synthesis of calcium stearate A calcium chloride solution with a content of 1074 kg/m3 (10° Bé) is added to the above-prepared sodium stearate solution and undergoes a metathesis reaction at about 65° C. to produce calcium stearate. Precipitation precipitated. Then it is filtered, washed and dried at about 90°C to obtain the finished product.

2. 5.60 g (0.1 mol) of calcium oxide was suspended in 300 mL of hot water at 55°C. Next, chemically pure 51.3 g of stearic acid was dissolved in 350 mL of hot water at 70° C., and 0.75 g of diethanolamine was further added and emulsified by stirring. The prepared stearic acid emulsion was gradually added to the calcium oxide suspension within 2 hours, and the mixture was stirred well. The formed white insoluble matter, calcium stearate, was filtered off and dried to give a product.

3. Direct method: Add quantitative stearic acid and CaO to reaction pot equipped with stirrer and thermometer, heat up to melting, slowly add catalyst H2O2 under continuous stirring, and vacuum, control reaction temperature at 140-150°C. The reaction was 1.5-2.0 h. After the reaction is completed, the product is discharged after being cooled and crushed.

4. Metathesis method: Dissolve stearic acid in hot water of 20 times the mass, add saturated caustic soda solution, and perform saponification at about 75°C to generate dilute sodium stearate solution. Then, the calcium chloride solution containing 1074 kg/m3 was added to the sodium stearate solution, and the metathesis reaction was performed at about 65 DEG C. The calcium stearate was precipitated. Then it is filtered, washed and dried at about 90°C to obtain the finished product.